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G. W. HAYTON. BRIDGE WALL FOR BOILER-S.

No. 575,948. Patented Jan. 26, 1897.

J WITNESSES IIVI/E/VTOR ATTORNEYS.

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UNITED STATES PATENT OFFICE.

GEORGE WALKER HAYTON, OF BROOKLYN, NEW YORK, ASSIGN OR OF ONE- HALF TOISIDOR BRAVEMAN, OF NEW YORK, N. Y.

BRIDGE-WALL FOR BOILERS.

SPECIFICATION forming part of Letters Patent No. 575,948, dated January26,1897.

Application filed May 1, 1896. Serial No. 589,908. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE WALKER HAY- TON, of Brooklyn, in the countyof Kings and State of New York, have invented new and usefulImprovements in Bridge \Valls for Boilers, of which the following is afull, clear, and exact description.

The object of the invention is to provide a new and improved bridge-wallfor marine and other boilers, and arranged to securely hold and lock thebricks in place to prevent the wall from being broken by the firemen inraking the fires.

The invention consists of certain parts and details and combinations ofthe same, as will be fully described hereinafter and then pointed out inthe claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is a sectional side elevation, on theline 1 1 in Fig. 2, of theimprovement as applied. Fig. 2 is a transverse section of the same onthe line 2 2 of Fig. 1. Fig. 3 is a perspective view of the key-brick,and Fig. 4 is a similar view of one of the end bricks.

The improved bridge-wall A is arranged at the end of a fire-box B and isprovided with the usual transverselyextending supportingplate O,fastened at the ends to the sides of the boiler in the usual manner. Ontop of this plate 0 are set the end bricks D and D, the intermediatebricks D and D and the key'brick D set in between the intermediatebricks D and D The opposing faces of the bricks D and D and those of thebricks D and D are interlocked, and for this purpose the inner faces ofthe end bricks D and D are provided with recesses D into which enterprojections D formed on the outer faces of the intermediate bricks D andD The inner faces of the intermediate bricks D and D are provided withgrooves D and corresponding grooves D are formed in the outer faces ofthe key-brick D Keys E are used to securely hold and fasten the brickstransversely in place by forcing the end bricks D D firmly against theside of'the boiler, as plainly indicated in Fig. 2. Each key E fits intothe grooves D and D of the key-brick D and the intermediate bricks D andD The two grooves D and D register one with the other, and theregistering grooves extend diagonally from the front upper corner of thebricks toward the rear lower corner, as plainly indicated in Fig. 1.

Now it will be seen that by the arrangement described the bricks can bereadily set up on the plate 0 and interlocked with each other andsecurely fastened in position by the keys E, as above explained. It isevident that such a set of bricks can be readily set up by any firemanor other unskilled person, so that in case a set of bricks are burnedout they can be readily replaced at any time by the attendant of theboiler and without the use of mortar or like building material.

It is understood that bridge-walls as heretofore constructed are made ofordinary firebricks set upon a plate 0, and it frequently happens thatthe bricks are knocked over by the fireman manipulating the raking-barover the fuel.

The boiler-shell fits snugly over the rounded-off end bricks D D toprevent any one of the bricks from being lifted up and knocked off theplate 0.

It is understood that the bridges of boilers should be maintained at alltimes at an even and certain height,with the view of regulating thedraft. In ordinary bridges built with bricks the latter are frequentlyknocked away one at a time, thus lowering the bridge and rendering itineffective for the purpose for which the Wall is built.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A bridge-wall for boilers,-comprising a series ofbricks having their faces provided respectively with projections andrecesses, whereby they are adapted to interlock with each other, akey-brick provided with grooves .grooves,substantially as shown anddescribed.

2. A bridge-wall for boilers, comprising end bricks, intermediate brickshaving their faces x0 and keys inserted between the faces of thekey-brick and the adjacent intermediate bricks, the said keys extendingin grooves formed in the adjacent faces from the upper front cornertoward the lower rear corner, substantially as shown and described.

lEORGE VALKER I-IAYTON.

XVitnesses THEO. G. Hosrnn, J AS. M. HENLEY.

